Friction modifier!!!!!!!!!
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Freshman User
Joined: Dec 2003
Posts: 38
Likes: 0
Friction modifier!!!!!!!!!
Who'd a thought, 4oz. of that smelly stuff and got rid of that annoying chatter coming from the rear end. Must have used the wrong synthentic lube. Thank you search file.
Posting Guru
Joined: Sep 2005
Posts: 2,476
Likes: 2
From: Monroe Michigan
I used ROYAL PURPLE synthetic 75w - 140w and was told I didn't need modifier. well, I did need to use modifier because I also had the chatter after the oil change.
I added the modifier and after a couple hundred miles, the chatter went away.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
What synthetic oil did you use ?
I used ROYAL PURPLE synthetic 75w - 140w and was told I didn't need modifier. well, I did need to use modifier because I also had the chatter after the oil change.
I added the modifier and after a couple hundred miles, the chatter went away.
I used ROYAL PURPLE synthetic 75w - 140w and was told I didn't need modifier. well, I did need to use modifier because I also had the chatter after the oil change.
I added the modifier and after a couple hundred miles, the chatter went away.
Logistics Pro
Joined: Aug 2005
Posts: 3,884
Likes: 180
From: Morgan Hill, CA
You'll need somewhere between 4 and 8 oz typically. You'll just slip the clutches more if you add too much. You'll get zero chatter. Sounds like you have something else going on.
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Senior User
Joined: Mar 2006
Posts: 342
Likes: 0
From: Rolla, MO
I used RP as well but I didn't add the friction modifier and I haven't had any issues at all. So, not sure why you guys are having trouble. 
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Senior User
Joined: Dec 2004
Posts: 175
Likes: 0
what does this chatter sound like, i have a growling noise coming from the front end online when the hubs are locked in and the truck is in 4wd. i did the front end over and since then i have hasd this problem, dont know what it sounded like before as i had to do the front end right when i bought the truck. i figured the growling was coming from the blue seals that you have to press on to the axles. i did add friction modifier though, i think 4 ounces.
Posting Guru
Joined: Oct 2008
Posts: 1,825
Likes: 2
From: Az
what does this chatter sound like, i have a growling noise coming from the front end online when the hubs are locked in and the truck is in 4wd. i did the front end over and since then i have hasd this problem, dont know what it sounded like before as i had to do the front end right when i bought the truck. i figured the growling was coming from the blue seals that you have to press on to the axles. i did add friction modifier though, i think 4 ounces.
Sounds like the wheel hub assembly to me.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
You are right about the front not needing the friction modifier. Only the LS need the stuff. The front is an open diff.
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
Posting Guru
Joined: Sep 2005
Posts: 2,476
Likes: 2
From: Monroe Michigan
You Royal Purple user might want to read this.
Senior User
Joined: Mar 2006
Posts: 342
Likes: 0
From: Rolla, MO
You Royal Purple user might want to read this.
Besides I scored my RP gear oil off e-bay for $20 so I'm not going to cry over $20.
And that is right, you don't need a friction modifier in the front.
